RICHMOND, Va. & BUDE, England--(BUSINESS WIRE)--Tripos Discovery Research Limited (TDR), a wholly owned subsidiary within the Commonwealth Biotechnologies, Inc. (CBI) group of companies (NASDAQ Capital Market:CBTE), announced today that it has entered into a Master Service Agreement with Elan Pharmaceuticals, Inc. to assist in analyzing and enhancing the diversity of its corporate small molecule screening collection.